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Texas Instruments LM324AN/NOPB
- Part No.:
- LM324AN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM324AN/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,921
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Product details
Overview
LM324AN/NOPB from Texas Instruments is a quad, low-power, internally frequency-compensated operational amplifier designed for single-supply operation from 3 V to 32 V (or ±1.5 V to ±16 V), featuring 1 MHz unity-gain bandwidth, 100 dB DC voltage gain, and input common-mode voltage range extending to ground - enabling direct sensing of ground-referenced transducer signals in industrial sensor interfaces and battery-powered instrumentation.
For engineers reviewing the LM324AN/NOPB datasheet, LM324AN/NOPB pinout, LM324AN/NOPB application, or LM324AN/NOPB equivalent, this device is selected for cost-sensitive, low-speed analog signal conditioning where rail-to-rail output swing is not required, supply current must remain below 1.2 mA per amplifier at 5 V, and input offset voltage ≤7 mV at 25°C is acceptable.
Technical Context
The LM324AN/NOPB uses a PNP-input stage enabling true ground-sensing capability and wide input common-mode range (0 V to V+ −1.5 V), with temperature-compensated bias and offset currents. Its class-A/class-B hybrid output stage supports both sourcing and sinking up to 40 mA while maintaining stable operation into 2-kΩ loads.
Internally compensated for unity-gain stability, it delivers consistent 1 MHz bandwidth across its full operating temperature range (0°C to +70°C) and supply voltage range, with power supply rejection ratio ≥65 dB and common-mode rejection ratio ≥65 dB - making it suitable for DC-coupled gain blocks and transducer amplifiers in non-precision industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single supply: 3 V to 32 V; dual supply: ±1.5 V to ±16 V - enables direct interface with 5 V digital logic rails without auxiliary supplies. |
| Unity-Gain Bandwidth | 1 MHz - supports audio-frequency and low-speed control-loop applications (e.g., temperature sensor amplification, DC motor feedback). |
| Input Offset Voltage | 2 mV (typ), 7 mV (max) at 25°C - sets baseline DC error in precision gain stages; requires trimming only in sub-mV accuracy designs. |
| Supply Current per Amplifier | 700 μA (typ), 1.2 mA (max) at 5 V - allows four op amps to operate on <5 mA total, ideal for battery-powered portable instruments. |
| Input Common-Mode Range | 0 V to V+ −1.5 V - permits direct connection of grounded sensors (e.g., thermocouples, strain gauges) without level-shifting circuitry. |
| Output Voltage Swing | 0 V to V+ −1.5 V (RL = 2 kΩ) - delivers usable headroom down to ground, supporting unipolar signal chains in single-supply systems. |
| Large-Signal Voltage Gain | 25 V/mV (min) at 15 V supply - ensures ≥2500 V/V open-loop gain for stable closed-loop configurations at moderate gains (e.g., G = 10–100). |
Pinout & Package
LM324AN/NOPB is packaged in a 14-pin plastic dual-in-line (PDIP) package with 19.177 mm × 6.35 mm body size and through-hole mounting. Pin numbering follows standard DIP orientation with notch-left indexing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT1 | Amplifier 1 output - drives external load; swing limited to 0 V to V+ −1.5 V under 2-kΩ load. |
| 2 | INPUT1− | Inverting input of Amp 1 - accepts feedback network or inverted signal path; high-impedance PNP node. |
| 3 | INPUT1+ | Noninverting input of Amp 1 - connects to reference, sensor, or signal source; common-mode range includes ground. |
| 4 | V+ | Positive supply rail - powers all four amplifiers; accepts 3–32 V DC or connects to +VCC in dual-supply mode. |
| 5 | INPUT2+ | Noninverting input of Amp 2 - electrically isolated from other channels; used for independent signal paths. |
| 6 | INPUT2− | Inverting input of Amp 2 - supports differential or inverting configurations without crosstalk. |
| 7 | OUTPUT2 | Amplifier 2 output - shares same output drive capability and voltage limits as OUTPUT1. |
| 8 | OUTPUT3 | Amplifier 3 output - identical electrical behavior to OUTPUT1/OUTPUT2; enables multi-channel signal processing. |
| 9 | INPUT3− | Inverting input of Amp 3 - maintains channel independence; no internal coupling to other inputs. |
| 10 | INPUT3+ | Noninverting input of Amp 3 - supports ground-referenced inputs like INPUT1+ and INPUT2+. |
| 11 | GND | Ground or negative supply - serves as return path for all four amplifiers; must be low-impedance for noise control. |
| 12 | INPUT4+ | Noninverting input of Amp 4 - completes quad configuration; compatible with single-ended sensor interfaces. |
| 13 | INPUT4− | Inverting input of Amp 4 - enables fourth independent gain stage or comparator function. |
| 14 | OUTPUT4 | Amplifier 4 output - provides final channel output; shares thermal and supply characteristics with other outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Eliminates need for dual ±15 V supplies - reduces BOM count and PCB area in embedded sensor nodes and PLC I/O modules. |
| Ground-sensing input stage | PNP input architecture allows input voltages down to 0 V - enables direct connection of grounded thermistors, RTDs, and bridge sensors. |
| Temperature-compensated bias current | 45 nA (typ) stable over 0°C to +70°C - minimizes drift-induced errors in long-term DC measurements without active compensation. |
| Low quiescent current | 700 μA per amplifier - supports always-on monitoring circuits in energy-constrained IoT edge devices powered by coin cells or small Li-ion batteries. |
| Internal unity-gain compensation | No external compensation required - simplifies layout and reduces component count in non-inverting buffers and basic gain stages. |
Applications
| Transducer Signal Conditioning | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Amplifying low-level mV outputs from load cells, pressure bridges, or thermocouples in factory-floor instrumentation. IC Role / Device Role / Timing Role: Quad op amp configured as four independent instrumentation-grade DC gain blocks with matched gain and offset. Use Value: Input common-mode range including ground eliminates level-shifting components; 1 MHz bandwidth supports dynamic response up to ~100 kHz. |
Use Scenario: Providing buffered analog inputs for programmable logic controllers (PLCs) accepting 0–10 V or 4–20 mA field signals. IC Role / Device Role / Timing Role: Four-channel signal conditioner converting raw sensor outputs to standardized voltage levels for ADC front-end interfacing. Use Value: Low 700 μA supply current per channel enables integration of multiple analog inputs without excessive board-level power dissipation. |
| Battery-Powered Instrumentation | DC Motor Feedback Control |
|
Use Scenario: Signal amplification and filtering in handheld multimeters, environmental monitors, or portable gas detectors. IC Role / Device Role / Timing Role: Quad amplifier implementing sensor excitation, signal gain, reference buffering, and comparator hysteresis in one IC. Use Value: Single 3–5 V supply operation and sub-5 mA total current draw extend battery life in AA- or Li-ion-powered devices. |
Use Scenario: Closed-loop speed and current sensing in brushed DC motor drivers for robotics and HVAC actuators. IC Role / Device Role / Timing Role: Dual op amps used for current-sense amplification and tachometer signal conditioning; remaining two for error amplification and PWM generation. Use Value: Output swing to ground supports direct interfacing with microcontroller ADCs referenced to system ground, avoiding level-shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | SOIC-14 surface-mount package; identical electrical specs but lower thermal resistance (88°C/W vs. 1130 mW PDIP derating limit). | Better suited for space-constrained PCBs and automated assembly; not pin-compatible with through-hole LM324AN/NOPB. | Select LM324DR for SMT production; retain LM324AN/NOPB for prototyping, repair, or legacy through-hole designs. |
| TLV2464CDR | Rail-to-rail input/output, 6.4 MHz GBW, 550 μA supply current - higher speed and wider dynamic range but 3.6 V max supply. | Required for 3.3 V systems or applications needing output swing within 10 mV of rails; incompatible with 12–24 V industrial supplies. | Choose TLV2464CDR only when rail-to-rail performance and >1 MHz bandwidth are mandatory; LM324AN/NOPB remains optimal for 5–32 V cost-sensitive designs. |
Compared with LM324DR and TLV2464CDR, LM324AN/NOPB offers superior voltage range flexibility (up to 32 V), lowest unit cost in PDIP, and proven reliability in decades of industrial deployments - making it the default choice for general-purpose, non-rail-to-rail, single-supply quad op amp needs.
Availability
LM324AN/NOPB is available at Aetrix Electronics and suitable for industrial sensor interfaces, battery-powered instrumentation, and DC motor feedback control requiring stable component supply and long-term obsolescence management.
Supply support for LM324AN/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of op amp innovation and broad manufacturing scale.
The LM324 series was designed as a cost-optimized, general-purpose quad op amp family for industrial, consumer, and automotive subsystems requiring robust single-supply operation and wide temperature tolerance.
FAQ
What is the maximum operating junction temperature for LM324AN/NOPB?
The LM324AN/NOPB has a maximum operating junction temperature of +70°C, as specified for the LM324-N grade. This rating applies across its full recommended supply range (3 V to 32 V) and defines the upper thermal limit for reliable continuous operation in ambient environments up to +70°C when properly heatsinked or mounted on standard FR-4 PCBs.
Can LM324AN/NOPB be used as a comparator?
Yes, LM324AN/NOPB can be used as a comparator in non-critical applications due to its open-loop configuration and rail-to-ground output swing. However, it lacks dedicated comparator features like internal hysteresis or fast propagation delay; for precision timing or high-speed switching, purpose-built comparators such as LM339 or TLV3701 are preferred over LM324AN/NOPB.
Does LM324AN/NOPB support dual-supply operation?
Yes, LM324AN/NOPB supports dual-supply operation from ±1.5 V to ±16 V. Its input common-mode range includes ground and its output swing extends to within 1.5 V of either rail - enabling conventional op amp topologies (e.g., inverting amplifiers, active filters) when ±5 V or ±12 V supplies are available, while retaining full compatibility with its single-supply specifications.
What is the typical input bias current of LM324AN/NOPB at 25°C?
The typical input bias current of LM324AN/NOPB is 45 nA at 25°C, with a maximum of 250 nA across the full operating temperature range (0°C to +70°C). This value reflects the PNP input stage's base current and remains essentially independent of supply voltage - simplifying design of high-impedance sensor interfaces without requiring bias-current cancellation networks.
Is LM324AN/NOPB RoHS compliant and lead-free?
Yes, LM324AN/NOPB is RoHS compliant and lead-free, as indicated by the "/NOPB" suffix in its part number. Texas Instruments certifies this variant as fully compliant with Directive 2011/65/EU, containing ≤1000 ppm lead and meeting all substance restrictions for cadmium, mercury, hexavalent chromium, PBB, and PBDE.
LM324AN/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 45 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LM324AN/NOPB FAQ
1.How can I place an order for LM324AN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324AN/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM324AN/NOPB reliable?
The price and inventory of LM324AN/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324AN/NOPB is usually 5 days.
3.What payment methods are accepted for LM324AN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324AN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324AN/NOPB?
LM324AN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324AN/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM324AN/NOPB?
For technical support, including LM324AN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324AN/NOPB requirements.
6.How does Aetrix verify that LM324AN/NOPB is sourced from the original manufacturer or authorized distributors?
All LM324AN/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM324AN/NOPB meets industry standards.
7.What is the process for return or replacement of LM324AN/NOPB?
All LM324AN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM324AN/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM324AN/NOPB part is unused and in its original packaging.
Return procedure for LM324AN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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